The Matchmakers, by Jennifer Colgan, is another freebie from Samhain, complete with content warning.
Book Description
Two wrongs don't make a right, but they just might make a perfect match...
Nick Garret is flypaper for females, and he likes it that way. Women stick for a while, and when it's over they fly away. So does he. Then one rain-slick night a young woman steps in front of his pickup truck, and his jaded, cynical life takes a sharp swerve toward trouble.
Calliope did the only thing she could think to get Nick to steer his truck-and his life-in a new direction. Banished from the Fae realm for granting a wish gone bad, her punishment is an impossible task; redeem the unredeemable Nick Garret. If she fails to help him pair three couples in everlasting bliss, he's doomed to never experience real love. And she will share his fate-as a mortal.
Nick can't decide if this charming, exasperating woman is a dream come true, or a saucy, sexy nightmare sent to drive him insane. Yet something about her makes him want to rise to her challenge. He'll do anything to make her stick around a while.
Besides, how much trouble can one half-naked, seemingly wingless faerie be?
Warning: This title contains sensual love scenes, mischievous Fae, removable wings and hot men in tool belts.